Exhale valve cover



FIG. 1 is a perspective view showing the new design for an exhale valve cover;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a back side view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top view thereof.

The broken lines form no part of the claimed design, and the shading is provided only to illustrate contour, it is not to indicate any particular texture. 

The ornamental design for an exhale valve cover, as shown and described. 